數(shù)值結(jié)構(gòu)：

有數(shù)組 houseList ，projectOptions ，我想對比數(shù)組，去除重復(fù)部分。最后只想得到 projectOptions 中不重復(fù)的部分。

      this.houseList = [
        {
          houseId: "1"
        },
        {
          houseId: "2"
        }
      ];
      this.projectOptions = [
        {
          id: "1"
        },
        {
          id: "2"
        },
        {
          id: "3"
        },
        {
          id: "4"
        }
      ];

采用 .map 和 .includes 進(jìn)行實(shí)現(xiàn)

      let Ids = this.houseList.map(item => item.houseId);
      let arr = new Array();
      this.projectOptions.forEach((item, index) => {
        if (!Ids.includes(item.id)) {
          arr.push(item);
        }
      });
      this.projectOptions = arr;